Susan and Carlos were unlikely friends. She was a young, overweight college professor and a bit of a trainwreck - juggling a divorce, a pack-a-day habit, and hiding empty boxes of wine under her bed. He was her boss, an Ironman triathlete, with life figured out. She was a whiner, he was a hard-ass. He had his shit together, she most assuredly did not. Trash-talking workouts, breakdowns, a devastating diagnosis - this heartwarming story of training buddies reveals a deep and abiding friendship that traversed life, sport, and everything in between.

Deena Kastor was a star youth runner with tremendous promise, yet her career almost ended after college, when her competitive method - run as hard as possible, for fear of losing - fostered a frustration and negativity and brought her to the brink of burnout. On the verge of quitting, she took a chance and moved to the high altitudes of Alamosa, Colorado, where legendary coach Joe Vigil had started the first professional distance-running team. There she encountered the idea that would transform her running career: the notion that changing her thinking - shaping her mind to be more encouraging, kind, and resilient - could make her faster than she’d ever imagined possible.

Finding Gobi is the miraculous tale of Dion Leonard, a seasoned ultramarathon runner who crosses paths with a stray dog while competing in a 155-mile race through the Gobi Desert in China. The lovable pup, who would later earn the name Gobi, proved that what she lacked in size, she more than made up for in heart, as she went step for step with Dion over the Tian Shan Mountains and across massive sand dunes, keeping pace with him for 77 miles.

Runners' vocabulary is full of acronyms like DNS for "Did Not Start" and DNF for "Did Not Finish," but when Mirna Valerio stepped up to the starting line, she needed a new one: DNQ for "Did Not Quit."

Welcome to the Barkley Marathons, a fever dream of an ultra event, inspired by a prison break, heralded by a conch blast, paid for in cigarettes and socks, and completed only by a select few. A race in which competitors haul themselves up mountains, through extreme weather conditions, beyond pain and exhaustion, mile after mile. Completed 60 miles? That’s just the fun run. In the Spell of the Barkley is a story of sporting obsession, exploring what drives individuals to challenge themselves at the limits of what is possible – and what it takes to succeed.

Isolated by Mexico's deadly Copper Canyons, the blissful Tarahumara Indians have honed the ability to run hundreds of miles without rest or injury. In a riveting narrative, award-winning journalist and often-injured runner Christopher McDougall sets out to discover their secrets. In the process, he takes his readers from science labs at Harvard to the sun-baked valleys and freezing peaks across North America, where ever-growing numbers of ultra-runners are pushing their bodies to the limit.

Kara Goucher grew up with Olympic dreams. She excelled at running from a young age and was offered a Nike sponsorship deal when she graduated from college. Then in 2004, she was invited to join a secretive, lavishly funded new team, dubbed the Nike Oregon Project. Coached by distance running legend Alberto Salazar, it seemed like the opportunity of a lifetime. Kara was soon winning a World Championship medal, going to the Olympics, and standing on the podium at the New York and Boston marathons, just like her coach. But behind the scenes, Salazar was hiding dark secrets.

From the best-selling author and renowned coach duo from Born to Run, a practical guide to running for everyone from amateurs to seasoned runners, about how to eat, race, and train like the world's best. Whether you're ramping up for a race or recuperating from an injury, Born to Run 2 is a holistic program for runners of every stripe that centers on seven key themes: food, fitness, form, footwear, focus, fun, and family.

This revolutionary training method has been embraced by elite runners - with extraordinary results - and now you can do it, too. Respected running and fitness expert Matt Fitzgerald explains how the 80/20 running program - in which you do 80 percent of runs at a lower intensity and just 20 percent at a higher intensity - is the best change runners of all abilities can make to improve their performance.

In The Science of Running, elite coach and exercise physiologist Steve Magness integrates the latest research with the training processes of the world's best runners, to deliver an in depth look at how to maximize your performance. It is a unique book that conquers both the scientific and practical points of running in two different sections. The first is aimed at identifying what limits running performance from a scientific standpoint. In section two, we turn to the practical application of this information and focus on the process of training to achieve your goals.

In 80/20 Running, respected running and fitness expert Matt Fitzgerald introduced his revolutionary training program and explained why doing 80 percent of runs at a lower intensity and just 20 percent at a higher intensity is the best way for runners at all levels - as well as cyclists, triathletes, and even weight-loss seekers - to improve their performance. Now, in this eye-opening follow-up, Fitzgerald teams with Olympic coach Ben Rosario to expand and update the 80/20 program to include ultramarathon training and such popular developments as the use of power meters.

This book is a blueprint for those who may not fit the image of a “traditional” runner—that is, someone who is larger in size, less athletic, out of shape, or dealing with any kind of health issue that slows them down—to feel empowered to lace up their shoes and embrace the body they have right now.

The greatest athletic performances spring from the mind, not the body. Elite athletes have known this for decades, and now science is learning why it's true. In his fascinating new book, How Bad Do You Want It?, coach Matt Fitzgerald examines more than a dozen pivotal races to discover the surprising ways elite athletes strengthen their mental toughness.

At the verge of turning 40, Peter Sagal - brainiac Harvard grad, short, bald Jew with a disposition toward heft, and a sedentary star of public radio - started running seriously. And much to his own surprise, he kept going, faster and further, running 14 marathons and logging tens of thousands of miles on roads, sidewalks, paths, and trails all over the US and the world, including the 2013 Boston Marathon, where he crossed the finish line moments before the bombings.

Every sports fan loves a great comeback. Is there a special quality shared by top athletes who triumph over great challenges? And can anyone acquire it? In The Comeback Quotient, celebrated sports writer Matt Fitzgerald supplies the answer to both questions. He identifies these mega-achievers of astounding athletic comebacks as "ultrarealists", men and women who succeed where others fail by fully accepting, embracing, and addressing the reality of their situations.